<html>
  <head>
    <style></style>
    <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
    <style>
      html, body {
        margin: 0; padding: 0;
        background: #f0f0f088;
      }
    </style>
  </head>
  <body>

    <div id="app">example</div>

    <script type="module" src="./index.js"></script>
  </body>
</html>